I protest that if some great Power would agree to make me always think what is true and do what is right, on condition of being turned into a sort of clock and would up every morning before I got out of bed, I should instantly close with the offer.

Teach a child what is wise, that is morality. Teach him what is wise and beautiful, that is religion!

It is one of the most saddening things in life that, try as we may, we can never be certain of making people happy, whereas we can almost always be certain of making them unhappy.

Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.

The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact.